CN116983800A - Cylinder desulfurization dust removal denitration separator - Google Patents
Cylinder desulfurization dust removal denitration separator Download PDFInfo
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- CN116983800A CN116983800A CN202311268993.6A CN202311268993A CN116983800A CN 116983800 A CN116983800 A CN 116983800A CN 202311268993 A CN202311268993 A CN 202311268993A CN 116983800 A CN116983800 A CN 116983800A
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- denitration
- desulfurization
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- flue gas
- dust removal
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 120
- 230000023556 desulfurization Effects 0.000 title claims abstract description 120
- 239000000428 dust Substances 0.000 title claims abstract description 100
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 110
- 239000003546 flue gas Substances 0.000 claims abstract description 110
- 238000000926 separation method Methods 0.000 claims abstract description 31
- 239000010410 layer Substances 0.000 claims description 121
- 239000003795 chemical substances by application Substances 0.000 claims description 102
- 230000003009 desulfurizing effect Effects 0.000 claims description 100
- 239000011229 interlayer Substances 0.000 claims description 59
- 239000003054 catalyst Substances 0.000 claims description 46
- 239000004744 fabric Substances 0.000 claims description 36
- 239000007921 spray Substances 0.000 claims description 23
- 238000007664 blowing Methods 0.000 claims description 20
- 230000008929 regeneration Effects 0.000 claims description 12
- 238000011069 regeneration method Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 150000001669 calcium Chemical class 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 3
- 230000001172 regenerating effect Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000007599 discharging Methods 0.000 abstract description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 239000004071 soot Substances 0.000 description 10
- 238000005507 spraying Methods 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- ZETCGWYACBNPIH-UHFFFAOYSA-N azane;sulfurous acid Chemical compound N.OS(O)=O ZETCGWYACBNPIH-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 206010022000 influenza Diseases 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- -1 vanadium-titanium metal oxide Chemical class 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/04—Cleaning filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
- B01D53/885—Devices in general for catalytic purification of waste gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
Abstract
The application discloses a cylinder type desulfurization, dust removal and denitration separation device, which comprises: the flue gas to be treated in the inner cylinder flue gas sequentially transversely flows through the desulfurization layer, the dust removal layer and the denitration layer and then enters the outer cylinder flue gas; the top of the inner cylinder flue is provided with a flue gas inlet which is used for allowing flue gas to be treated to enter the inner cylinder flue; the desulfurization layer is used for separating SO in the flue gas to be treated 2 ToDesulfurization is realized; the dust removing layer is used for separating dust in the flue gas to be treated so as to realize dust removal; the denitration layer is used for separating NOx in the flue gas to be treated so as to realize denitration; the bottom of the outer cylinder flue is provided with a flue gas outlet, and the flue gas outlet is used for discharging flue gas which is sequentially and transversely flowed through the desulfurization layer, the dust removal layer and the denitration layer. The application integrates the desulfurization, denitrification and dedusting technology by adopting the cylindrical structure, has simple structure and small occupied area, can stably run for a long time and meets the use requirement.
Description
Technical Field
The application relates to the technical field of flue gas treatment, in particular to a cylinder type desulfurization, dust removal and denitration separation device.
Background
At present, the existing technology comprises a wet limestone-gypsum method WFGD and a dry SCR after dedusting, and the three technologies respectively and independently work, and although the technology can reach the emission standard, the content of sulfur and nitrate in high-temperature flue gas is unstable, so that long-term stable operation is difficult to ensure, the utilization rate of resources is low, the use requirement cannot be met, and the three sets of equipment are huge in volume, complex in structure, large in occupied area and high in investment and operation cost.
Therefore, in order to reduce the cost of flue gas purification and meet the requirements of small and medium-sized factories, the development of a new generation of combined desulfurization, denitrification and dust removal device with advanced technology and economical and reasonable technology becomes a necessary trend.
Therefore, it is needed to provide a cartridge type desulfurization, dust removal, and denitration separation device to solve the above-mentioned technical problems.
Disclosure of Invention
The application provides a cylinder type desulfurization, denitrification and dedusting separation device which integrates desulfurization, denitrification and dedusting technologies, has a simple structure and small occupied area, can stably run for a long time, and meets the use requirements.
According to some embodiments, the application provides a cartridge desulfurization, dust removal, and denitration separation device, comprising: the flue gas to be treated in the inner cylinder flue gas channel transversely flows through the desulfurization layer, the dust removal layer and the denitration layer in sequence and then enters the outer cylinder flue gas channel; the top of the inner cylinder flue is provided with a flue gas inlet which is used for allowing flue gas to be treated to enter the inner cylinder flue; the desulfurization layer is used for separating SO in the flue gas to be treated 2 To achieve desulfurization; the dust removing layer is used for separating dust in the flue gas to be treated so as to realize dust removal; the denitration layer is used for separating NOx in the flue gas to be treated so as to realize denitration; the bottom of the outer cylinder flue is provided with a flue gas outlet, and the flue gas outlet is used for allowing the flue gas to flow through the desulfurization layer, the dust removal layer and the purified flue gas treated by the denitration layer in sequence in a transverse direction to be discharged.
Optionally, the desulfurization layer is provided with a desulfurization interlayer, and a desulfurizing agent is filled in the desulfurization interlayer; the inner and outer wallboard of the desulfurization layer is arranged to be a porous plate structure, so that the flue gas to be treated discharged from the inner barrel flue can enter the desulfurization interlayer through the porous plate structure for desulfurization treatment.
Optionally, a desulfurizing agent inlet communicated with the desulfurizing interlayer is arranged at the upper end of the desulfurizing layer, and a desulfurizing agent outlet communicated with the desulfurizing interlayer is arranged at the lower end of the desulfurizing layer; the desulfurizing agent enters the desulfurizing interlayer from the desulfurizing agent inlet and flows from top to bottom under the action of self gravity; and the desulfurizing agent flows out from the desulfurizing agent outlet in real time and is sent to a desulfurizing agent regeneration device for regeneration treatment.
Optionally, the desulfurizing layer is provided with a pneumatic sealing discharger at the position of the desulfurizing agent inlet and the position of the desulfurizing agent outlet, and the pneumatic sealing discharger is used for adjusting the outflow rate of the desulfurizing agent from the desulfurizing agent outlet so as to control the desulfurizing efficiency.
Optionally, the desulfurizing agent is a particulate desulfurizing agent including, but not limited to, activated coke, activated calcium particles.
Optionally, the dust removing layer comprises a cloth bag framework, a cloth bag, a pulse ash removing spray pipe and an ash bucket, wherein the cloth bag is sleeved in the cloth bag framework to remove dust from the flue gas subjected to desulfurization treatment of the desulfurization layer; the pulse ash removal spray pipe is vertically arranged in the cloth bag framework and is used for blowing off dust adsorbed on the cloth bag; the ash bucket is arranged at the bottom of the cloth bag framework and is used for collecting dust blown off from the cloth bag.
Optionally, the denitration layer is provided with a denitration interlayer, and a modular honeycomb catalyst is filled in the denitration interlayer; the inner and outer wallboard of denitration layer sets up to the perforated plate structure, and the confession is passed through the flue gas after the dust removal layer dust removal is handled can enter into through the perforated plate structure in the denitration intermediate layer carries out denitration treatment.
Optionally, a catalyst inlet communicated with the denitration interlayer is arranged at the upper end of the denitration layer, and a catalyst outlet communicated with the denitration interlayer is arranged at the lower end of the denitration layer; the catalyst is loaded into the denitration interlayer from the catalyst inlet from top to bottom and is discharged from the catalyst outlet; the catalyst inlet and the catalyst outlet are each provided with a respective sealing cover plate.
Optionally, an air-jet grille is arranged between the denitration layer and the dedusting layer, and the air-jet grille is respectively connected to an external heating device and a denitration agent supply device through two independent pipelines; the denitration agent supply device sprays a denitration agent into the denitration interlayer through the air injection grid so as to realize SCR denitration treatment; and the heating device sprays high-temperature gas into the denitration interlayer through the air-jet grille so as to realize the regeneration of the modular honeycomb catalyst.
Optionally, the cylinder type desulfurization, dust removal and denitration separation device is arranged in a plurality of parallel connection, and the top of an inner cylinder flue of the cylinder type desulfurization, dust removal and denitration separation device is connected to a total flue gas inlet pipe in parallel; the bottom of the outer cylinder flue of the cylinder type desulfurization, dust removal and denitration separation device is connected to the total flue gas discharge pipe in parallel.
Embodiments of the present disclosure have at least the following advantages:
the sleeve type structure is adopted to combine the inner cylinder flue, the desulfurization layer, the dust removal layer, the denitration layer and the outer cylinder flue into a whole, the flue gas to be treated can sequentially and transversely flow through the desulfurization layer, the dust removal layer and the denitration layer after being separated and treated, and then enters the outer cylinder flue for discharge.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic structural diagram of a cylinder type desulfurization, dust removal, and denitration separation device in an embodiment of the application;
FIG. 2 is a schematic diagram II of a cylinder type desulfurization, dust removal and denitration separation device in an embodiment of the application;
FIG. 3 is a schematic cross-sectional view of a desulfurization layer in an embodiment of the present application;
FIG. 4 is a schematic cross-sectional view of a dust removing layer according to an embodiment of the present application;
fig. 5 is a schematic cross-sectional view of a denitration layer in an embodiment of the present application.
Reference numerals: 1. an inner cylinder flue; 11. a flue gas inlet; 2. a desulfurization layer; 21. a desulfurization interlayer; 22. desulfurizing agent; 23. a desulfurizing agent inlet; 24. a desulfurizing agent outlet; 25. pneumatic sealing discharger; 3. a dust removing layer; 31. a cloth bag framework; 32. a cloth bag; 33. pulse ash cleaning spray pipe; 331. a soot blowing nozzle; 34. an ash bucket; 35. an ash conveying device; 36. an ash bin; 4. a denitration layer; 41. a denitration interlayer; 42. a catalyst; 43. a catalyst inlet; 44. a catalyst outlet; 45. sealing the cover plate; 5. an outer cylinder flue; 51. a flue gas outlet; 6. a desulfurizing agent regeneration device; 7. a sulfuric acid preparation device; 8. a jet grille; 81. a jet nozzle; 9. SCR soot blowing spray pipe; 91. an SCR soot blowing nozzle; 101. a heating device; 102. and a denitration agent supply device.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, it will be understood by those of ordinary skill in the art that in various embodiments of the present application, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the claimed technical solution of the present application can be realized without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not be construed as limiting the specific implementation of the present application, and the embodiments can be combined with each other and cited with each other without contradiction.
The embodiment of the application provides a cylinder type desulfurization, dust removal and denitration separation device, which is shown by referring to fig. 1 and comprises: the flue gas treatment device comprises an inner cylinder flue 1, a desulfurization layer 2, a dust removal layer 3, a denitration layer 4 and an outer cylinder flue 5 which are sequentially sleeved from inside to outside, wherein a flue gas inlet 11 is formed in the top of the inner cylinder flue 1, the flue gas inlet 11 is used for allowing flue gas to be treated to enter the inner cylinder flue 1, and the flue gas to be treated then sequentially and transversely flows through the desulfurization layer 2, the dust removal layer 3 and the denitration layer 4 for treatment respectively; wherein; the desulfurization layer 2 is used for separating SO in the flue gas to be treated 2 To achieve desulfurization; the dust removing layer 3 is used for separating dust in the flue gas to be treated so as to realize dust removal; the denitration layer 4 is used for separating NOx in the flue gas to be treated so as to realize denitration; the bottom of the outer cylinder flue 5 is provided with a flue gas outlet 51,the flue gas outlet 51 is used for discharging purified flue gas which sequentially and transversely flows through the desulfurization layer 2, the dust removal layer 3 and the denitration layer 4 after treatment. The length L of the barrel type desulfurizing, dedusting and denitrating separation device can be adjusted according to practical conditions, and the diameter phi of the barrel type desulfurizing, dedusting and denitrating separation device is adjusted according to the thickness of each layer, so that the embodiment is not particularly limited.
In the embodiment, the cylinder type desulfurization, dust removal and denitration separation device adopts a sleeve type structure to integrate an active carbon desulfurization method, a cloth bag dust removal method and an SCR denitration method, and is common to the traditional active carbon desulfurization method, wherein the active carbon is made into a three-dimensional or horizontal bed through which flue gas passes to realize desulfurization treatment, and the form is difficult to be made into multiple layers and can not be replaced, so that the method is difficult to apply in engineering; most of the bag-type dust removal methods adopt a bag-type or filter cartridge type, the bag-type dust removal methods and the active carbon desulfurization methods cannot be well integrated, so that a sleeve-type structure is arranged in the embodiment, the inner cylinder flue 1, the desulfurization layer 2, the dust removal layer 3, the denitration layer 4 and the outer cylinder flue 5 are combined into a whole, flue gas to be treated can be transversely desulfurized, dedusted and denitrated in sequence and discharged after being separated, the sleeve-type dust removal and denitration separation device is feasible in engineering, and the sleeve-type structure can break through the fact that the conventional desulfurization layer is generally horizontal or three-dimensional, the active carbon bed layer cannot be well integrated with the bag-type dust remover of the cylinder type or the bag-type dust removal device, and is difficult to replace or apply in engineering.
In this embodiment, it should be noted that the cylinder type desulfurizing, dedusting and denitrating separation device may be set as a plurality of parallel connection devices, and the plurality of parallel connection devices are adopted to treat the flue gas to be treated at the same time, so as to meet the conditions of different flue gas amounts. In one example, the tops of the inner barrel flues 1 of the barrel type desulfurization, dust removal and denitration separation devices are connected to a total flue gas inlet pipe in parallel, and flue gas to be treated is respectively dispersed and flowed into the inner barrel flues 1 of each barrel type desulfurization, dust removal and denitration separation device from the total flue gas inlet pipe; the bottom of the outer cylinder flue 5 of the cylinder type desulfurization, dust removal and denitration separation device is connected to a total flue gas discharge pipe in parallel, after the flue gas to be treated is treated by each cylinder type desulfurization, dust removal and denitration separation device, the flue gas is respectively discharged into the total flue gas discharge pipe by the outer cylinder flue 5 of each cylinder type desulfurization, dust removal and denitration separation device, and finally the flue gas is intensively discharged into the atmosphere by the total flue gas discharge pipe.
In this embodiment, as shown in fig. 1, it should be further described that the inner tube flue 1 is used as an inlet tube of the flue gas to be treated, the outer wall of the inner tube flue 1 is configured to be of a porous structure, so that the flue gas to be treated in the inner tube flue 1 can be discharged through the porous structure and flows into the desulfurization layer 2 on the next layer, or a gap is formed between the inner tube flue 1 and the desulfurization layer 2, the bottom of the inner tube flue 1 is configured as a flue gas outlet, the flue gas to be treated flows into the gap between the inner tube flue 1 and the desulfurization layer 2 after flowing out from the flue gas outlet on the bottom, and then enters the desulfurization layer 2 from the gap.
The following describes the desulfurization layer 2, the dust removal layer 3 and the denitration layer 4 one by one:
referring to fig. 1 and 3, in the present embodiment, the desulfurization layer 2 is provided with a desulfurization interlayer 21, and a desulfurizing agent 22 is filled in the desulfurization interlayer 21, and the desulfurizing agent 22 may be a granular desulfurizing agent such as activated coke or activated calcium particles. Because the outside of section of thick bamboo flue 1 is gone into to desulfurization layer 2 suit, so in order to be convenient for wait to handle the flue gas and can enter into desulfurization intermediate layer 21 in realize desulfurization treatment, set up the inside and outside wallboard of desulfurization layer 2 in this embodiment as porous plate structure too to can supply wait to handle the flue gas and enter into desulfurization intermediate layer 21 through this porous plate structure and carry out desulfurization treatment, it should be noted that the aperture setting of porous plate structure needs to guarantee to wait to handle the flue gas and can pass through, and desulfurizing agent 22 can not pass through, in order to avoid desulfurizing agent 22 to fall out from the aperture of this porous plate structure and fall into in the dust removal layer 3, influence desulfurization treatment's effect. The specific pore size may be adjusted according to the particle size of the desulfurizing agent 22, and is not particularly limited in this embodiment.
Referring to fig. 2 and 3, it should be further noted that, the upper end of the desulfurization layer 2 is provided with a desulfurizing agent inlet 23, the desulfurizing agent inlet 23 is connected to the desulfurization interlayer 21, the lower end of the desulfurization layer 2 is provided with a desulfurizing agent outlet 24, and the desulfurizing agent outlet 24 is connected to the desulfurization interlayer 21, so that the desulfurizing agent 22 can be loaded into the desulfurization interlayer 21 from the desulfurizing agent inlet 23 when loaded, and flows from top to bottom under the action of self gravity, and meanwhile, the desulfurizing agent 22 flows out from the desulfurizing agent outlet 24 in real time and is sent to the external desulfurizing agent regeneration device 6 for regeneration treatment, and the regenerated desulfurizing agent 22 can be reused again. Therefore, by adopting the mode that the desulfurizing agent 22 flows in the desulfurizing interlayer 21 from top to bottom, the new desulfurizing agent 22 can be always kept to enter the desulfurizing interlayer 21 from the desulfurizing agent inlet 23 at the top to realize the desulfurization of the flue gas, and meanwhile, the desulfurizing agent 22 with saturated adsorption always flows out of the desulfurizing interlayer 21 from the desulfurizing agent outlet 24 at the bottom, so that the desulfurizing efficiency can be ensured.
In one example, the desulfurizing agent regeneration apparatus 6 may adopt a high Wen Jiexi method, the activated carbon may be resolved at a temperature of about 300 degrees, and the resolved activated carbon still has a porous structure to achieve an adsorption function, so that the resolved activated carbon is again charged into the desulfurization interlayer 21 from the desulfurizing agent inlet 23 to achieve adsorption of sulfur dioxide in the flue gas. And the sulfur dioxide separated by the activated carbon can be sent to a sulfuric acid preparation device 7 to prepare industrial sulfuric acid.
With continued reference to fig. 3, it should be further noted that the desulfurizing layer 2 is provided with a pneumatic seal discharger 25 at both the position of the desulfurizing agent inlet 23 and the position of the desulfurizing agent outlet 24, and the pneumatic seal discharger 25 is used for adjusting the outflow rate of the desulfurizing agent 22 from the desulfurizing agent outlet 24 so as to control the desulfurizing efficiency. The pneumatic sealing discharger 25 can control the outflow rate of the desulfurizing agent 22 from the desulfurizing agent outlet 24, and then the sulfur dioxide concentration of the desulfurizing agent inlet 23 and the desulfurizing agent outlet 24 can be detected, if the sulfur dioxide concentration of the desulfurizing agent outlet 24 is detected to be higher, the adsorption efficiency of the desulfurizing agent 22 to sulfur dioxide needs to be improved, so that the opening size of the desulfurizing agent outlet 24 can be adjusted through the pneumatic sealing discharger 25, if the opening degree of the desulfurizing agent outlet 24 is reduced, the desulfurizing agent 22 can stay in the desulfurizing interlayer 21 for a longer time and more, and the desulfurizing agent 22 can fully absorb sulfur dioxide in flue gas in the desulfurizing interlayer 21; if the sulfur dioxide concentration of the desulfurizing agent outlet 24 is detected to be low, the requirement is satisfied, the opening of the desulfurizing agent outlet 24 can be increased, the desulfurizing agent 22 can flow out from the desulfurizing agent outlet 24 at a higher speed, and the adsorption efficiency of the desulfurizing agent 22 is reduced. How to set up can be chosen according to actual conditions.
In this embodiment, the air tightness between the desulfurization layer 2 and the inner cylinder flue 1 needs to be maintained, and it needs to be ensured that the flue gas of the inner cylinder flue 1 can only flow through the desulfurization layer 2 transversely, but cannot flow out from the desulfurizing agent inlet 23 at the top or the desulfurizing agent outlet 24 at the bottom, so that the pneumatic sealing discharger 25 is selected at the positions of the desulfurizing agent inlet 23 and the desulfurizing agent outlet 24 as a regulating valve, on one hand, the pneumatic sealing discharger 25 can improve the air tightness in the desulfurization layer 2, ensure that the flue gas cannot escape from the positions of the desulfurizing agent inlet 23 and the desulfurizing agent outlet 24, and simultaneously realize the real-time in-out function of the desulfurizing agent 22.
Referring to fig. 1, 2 and 4, in this embodiment, it should be noted that, after the flue gas is subjected to desulfurization treatment by the desulfurization layer 2, the flue gas transversely flows through the next layer of the dust removal layer 3 to implement dust removal treatment, where the dust removal layer 3 includes a cloth bag skeleton 31, a cloth bag 32, a pulse ash removal nozzle 33 and an ash bucket 34, the cloth bag skeleton 31 adopts a cylindrical cage for supporting the cloth bag 32, the cloth bag 32 is sleeved inside the cloth bag skeleton 31 and is integrally sleeved on the desulfurization layer 2, so that the flue gas transversely passes through the cloth bag 32 to implement dust removal treatment after being subjected to desulfurization treatment by the desulfurization layer 2, and the flue gas after dust removal treatment passes through the cloth bag skeleton 31 to enter the next layer. The pulse ash removal spray pipe 33 is vertically arranged in the cloth bag framework 31 and is used for blowing off dust adsorbed on the cloth bag 32, the upper part of the pulse ash removal spray pipe 33 is connected with an external air inlet pipeline, and the pulse ash removal spray pipe 33 adopts compressed nitrogen to clean the dust adsorbed on the cloth bag 32. The pulse ash cleaning spray pipe 33 is further provided with a plurality of ash blowing nozzles 331 for blowing air to the cloth bag 32, the ash blowing nozzles 331 are uniformly arranged at equal intervals along the height direction of the pulse ash cleaning spray pipe 33, and the ash blowing nozzles 331 are used for blowing off dust adsorbed on the cloth bag 32. The ash bucket 34 is connected to the bottom of the cloth bag framework 31 and is used for collecting dust blown off from the cloth bag 32, and the dust cleaned by the pulse ash cleaning spray pipe 33 on the cloth bag 32 falls into the ash bucket 34 at the bottom due to the action of gravity, and when a certain amount of dust is accumulated in the ash bucket 34, the dust is discharged from the bottom of the ash bucket 34. The outlet of the ash bucket 34 is also connected with an ash conveying device 35, and the ash conveying device 35 conveys the dust in the ash bucket 34 to an ash bin 36 for collection, wherein the ash conveying device 35 can be a screw conveyor.
Referring to fig. 1, 2 and 5, in this embodiment, it should be further described that after the flue gas is subjected to the dust removal treatment by the dust removal layer 3, the flue gas transversely flows through the next layer of the denitration layer 4 to implement the denitration treatment, wherein the denitration layer 4 is provided with a denitration interlayer 41, a module honeycomb-shaped catalyst 42 is filled in the denitration interlayer 41, and an inner wall plate and an outer wall plate of the denitration layer 4 are arranged as a porous plate structure, so that the flue gas to be treated can enter the denitration interlayer 41 through the porous plate structure after the flue gas is subjected to the dust removal treatment.
In one implementation manner, the upper end of the denitration layer 4 is provided with a catalyst inlet 43 communicated with the denitration interlayer 41, the lower end of the denitration layer 4 is provided with a catalyst outlet 44 communicated with the denitration interlayer 41, a new catalyst 42 is loaded into the denitration interlayer 41 from the catalyst inlet 43, and a spent catalyst 42 is discharged from the catalyst outlet 44 for replacement, so that the catalyst 42 which enters the denitration interlayer 41 first can be discharged first after the adsorption failure is completed, and the catalytic performance of the catalyst 42 is utilized to the maximum. In order to ensure the tightness of the denitration interlayer 41, corresponding sealing cover plates 45 are arranged at the catalyst inlet 43 and the catalyst outlet 44, and the sealing cover plates 45 can be detachably mounted on the catalyst inlet 43 and the catalyst outlet 44 through flanges, so that the catalyst 42 in the denitration interlayer 41 can be replaced in the later period.
With continued reference to fig. 1, 2 and 5, in this embodiment, it should be further noted that an air-jet grille 8 and an SCR soot-blowing nozzle 9 are disposed between the denitration layer 4 and the dedusting layer 3, and the air-jet grille 8 is used for spraying a denitration agent into the denitration interlayer 41 to implement SCR denitration treatment, where the denitration agent may be ammonia. The air-jet grille 8 is arranged in a ring shape to realize the omnibearing spraying of the denitration interlayer 41 with the denitration agent, and the air-jet grille 8 is provided with the air-jet nozzle 81, and the denitration agent can be sprayed on the denitration interlayer 41 in a diffusion manner by adopting the air-jet nozzle 81, so that the denitration agent has a larger contact area with the catalyst 42 in the denitration interlayer 41.
The SCR soot blowing spray pipe 9 is used for spraying gas into the denitration interlayer 41 to blow off adsorbed dust, the upper part of the SCR soot blowing spray pipe 9 is connected with an external air inlet pipeline, the SCR soot blowing spray pipe 9 is also provided with a plurality of SCR soot blowing nozzles 91 for spraying gas into the denitration interlayer 41, and the plurality of SCR soot blowing nozzles 91
The SCR soot blowing nozzles 91 are arranged at equal intervals along the height direction of the SCR soot blowing nozzles 9, and are used for blowing off dust on the denitration interlayer 41.
In the embodiment, a low-temperature SCR denitration method is adopted, and the SCR denitration principle mainly uses a catalyst to spray ammonia into the flue gas to spray NO X Reduction to N 2 And H 2 O, wherein the main chemical reaction equation is as follows:
4NO+4NH 3 +O 2 =4N 2 +6H 2 O；
6NO 2 +8NH 3 =7N 2 +2H 2 O；
the catalyst 42 is typically a vanadium-titanium metal oxide catalyst, ammonia sulfite is generated during the reaction, and has a certain viscosity, and the ammonia sulfite adheres to the surface of the catalyst 42, so that the flue gas is isolated, and the catalytic performance of the catalyst 42 is affected, thereby causing deactivation. Therefore, in this embodiment, the air-jet grille 8 may also control the switching pipeline to spray high temperature gas through the valve to realize regeneration of the catalyst 42, and ammonia sulfite may decompose and regenerate in gaseous form at a temperature above 250 ℃, and then may decompose ammonia sulfite adhered to the surface of the catalyst 42 by spraying high temperature gas to realize regeneration of the catalyst 42.
Referring to fig. 2 and 5, in an example, a heating device 101 and a denitration agent supply device 102 are disposed outside, the air injection grille 8 is connected to the heating device 101 and the denitration agent supply device 102 through two independent pipelines, the heating device 101 heats air or clean flue gas, heated hot air enters the air injection grille 8 through the pipelines, and then the air injection grille 8 injects high-temperature gas into the surface of the catalyst 42 to realize regeneration treatment of the catalyst 42. The denitration agent supply device 102 supplies the denitration agent through the outside, the denitration agent supply device 102 sprays the denitration agent into the denitration interlayer 41 through the air injection grid 8, wherein valves are arranged on the pipelines on the heating device 101 and the denitration agent supply device 102, and when the denitration agent supply device is required to be switched for use, the corresponding valves are only required to be opened, so that the air injection grid 8 in the embodiment can switch the pipelines at any time, and thereby the denitration agent spraying or the high-temperature gas spraying is realized.
The implementation principle of the embodiment is as follows: the flue gas to be treated enters the inner barrel flue 1 from the flue gas inlet 11, then the flue gas transversely flows into the desulfurization layer 2 of the next layer through the porous structure of the inner wall and the outer wall of the inner barrel flue 1, the flue gas is subjected to desulfurization treatment in the desulfurization interlayer 21 of the desulfurization layer 2, the flue gas transversely flows into the dust removing layer 3 of the next layer after the completion of the desulfurization treatment, the flue gas is subjected to dust removing treatment when passing through the cloth bag 32, the flue gas after the dust removing treatment transversely flows into the denitration layer 4 of the next layer, the flue gas is subjected to SCR denitration in the denitration interlayer 41 of the denitration layer 4, the flue gas after the completion of the denitration treatment transversely flows into the outer barrel flue 5, and the outer barrel flue 5 discharges purified flue gas, so that the flue gas to be treated is sequentially and transversely subjected to desulfurization, dust removing and denitration treatment and then discharged, and the flue gas to be treated is feasible from engineering.
It is to be understood that the above-described embodiments of the present application are merely illustrative of or explanation of the principles of the present application and are in no way limiting of the application. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application should be included in the scope of the present application. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.
Claims (10)
1. The utility model provides a cylinder desulfurization dust removal denitration separator which characterized in that includes:
the flue gas to be treated in the inner cylinder flue (1) transversely flows through the desulfurization layer (2), the dust removal layer (3) and the denitration layer (4) in sequence and then enters the outer cylinder flue (5);
a flue gas inlet (11) is formed in the top of the inner barrel flue (1), and the flue gas inlet (11) is used for allowing flue gas to be treated to enter the inner barrel flue (1);
the desulfurization layer (2) is used for separating SO in the flue gas to be treated 2 To achieve desulfurization;
the dust removing layer (3) is used for separating dust in the flue gas to be treated so as to realize dust removal;
the denitration layer (4) is used for separating NOx in the flue gas to be treated so as to realize denitration;
the bottom of the outer cylinder flue (5) is provided with a flue gas outlet (51), and the flue gas outlet (51) is used for allowing the flue gas to sequentially and transversely flow through the desulfurization layer (2), the dust removal layer (3) and the purified flue gas treated by the denitration layer (4) to be discharged.
2. The cartridge desulfurization dust removal denitration separation device according to claim 1, wherein the desulfurization layer (2) is provided with a desulfurization interlayer (21), and a desulfurizing agent (22) is filled in the desulfurization interlayer (21);
the inner and outer wallboard of the desulfurization layer (2) is arranged into a porous plate structure, so that the flue gas to be treated discharged from the inner cylinder flue (1) can enter the desulfurization interlayer (21) through the porous plate structure for desulfurization treatment.
3. The cylinder type desulfurization, dust removal and denitration separation device according to claim 2, wherein a desulfurizing agent inlet (23) communicated with the desulfurization interlayer (21) is arranged at the upper end of the desulfurization layer (2), and a desulfurizing agent outlet (24) communicated with the desulfurization interlayer (21) is arranged at the lower end of the desulfurization layer (2);
the desulfurizing agent (22) enters the desulfurizing interlayer (21) from the desulfurizing agent inlet (23) and flows from top to bottom under the action of self gravity;
the desulfurizing agent (22) flows out from the desulfurizing agent outlet (24) in real time and is sent to the desulfurizing agent regenerating device (6) for regeneration treatment.
4. A cartridge desulfurization dust removal denitration separator as claimed in claim 3, characterized in that the desulfurization layer (2) is provided with a pneumatic seal discharger (25) at both the position of the desulfurizing agent inlet (23) and the position of the desulfurizing agent outlet (24), the pneumatic seal discharger (25) being for adjusting the rate at which the desulfurizing agent (22) flows out from the desulfurizing agent outlet (24) to control desulfurization efficiency.
5. Cartridge desulfurization dust removal denitration separator according to any one of claims 2-4, wherein the desulfurizing agent (22) is a particulate desulfurizing agent, including but not limited to activated coke, activated calcium particles.
6. The cylinder type desulfurization, dust removal and denitration separation device according to claim 1, wherein the dust removal layer (3) comprises a cloth bag framework (31), a cloth bag (32), a pulse ash removal spray pipe (33) and an ash bucket (34), and the cloth bag (32) is sleeved inside the cloth bag framework (31) so as to carry out dust removal treatment on flue gas subjected to desulfurization treatment of the desulfurization layer (2);
the pulse ash removal spray pipe (33) is vertically arranged in the cloth bag framework (31) and is used for blowing off dust adsorbed on the cloth bag (32);
the ash bucket (34) is arranged at the bottom of the cloth bag framework (31) and is used for collecting dust blown off on the cloth bag (32).
7. The cartridge desulfurization, dust removal, and denitration separation device according to claim 1, wherein the denitration layer (4) is provided with a denitration interlayer (41), and a modular honeycomb catalyst (42) is filled in the denitration interlayer (41);
the inner and outer wall plates of the denitration layer (4) are of porous plate structures, so that flue gas subjected to dust removal treatment by the dust removal layer (3) can enter the denitration interlayer (41) through the porous plate structures to be subjected to denitration treatment.
8. The cylinder type desulfurization, dust removal and denitration separation device according to claim 7, wherein a catalyst inlet (43) communicated with the denitration interlayer (41) is arranged at the upper end of the denitration layer (4), and a catalyst outlet (44) communicated with the denitration interlayer (41) is arranged at the lower end of the denitration layer (4);
the catalyst (42) is loaded into the denitration interlayer (41) from the catalyst inlet (43) from top to bottom, and is discharged from the catalyst outlet (44);
the catalyst inlet (43) and the catalyst outlet (44) are each provided with a respective sealing cover plate (45).
9. The cylinder type desulfurization, dust removal and denitration separation device according to claim 8, wherein an air injection grid (8) is arranged between the denitration layer (4) and the dedusting layer (3), and the air injection grid (8) is respectively connected to an external heating device (101) and a denitration agent supply device (102) through two independent pipelines;
the denitration agent supply device (102) sprays a denitration agent into the denitration interlayer (41) through the air injection grid (8) so as to realize SCR denitration treatment;
the heating device (101) sprays high-temperature gas into the denitration interlayer (41) through the air-jet grille (8) so as to realize the regeneration of the catalyst (42).
10. The cylinder type desulfurization, dust removal and denitration separation device according to claim 1 is characterized in that the cylinder type desulfurization, dust removal and denitration separation device is arranged in a plurality of parallel connection, and the top of an inner cylinder flue (1) of the cylinder type desulfurization, dust removal and denitration separation device is connected to a total flue gas inlet pipe in parallel; the bottom of an outer cylinder flue (5) of the cylinder type desulfurization, dust removal and denitration separation device is connected to a total flue gas discharge pipe in parallel.
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| CN202311268993.6A CN116983800A (en) | 2023-09-28 | 2023-09-28 | Cylinder desulfurization dust removal denitration separator |
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| CN202311268993.6A CN116983800A (en) | 2023-09-28 | 2023-09-28 | Cylinder desulfurization dust removal denitration separator |
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Application publication date: 20231103 |